John R. Grehan

About

John R. Grehan is a scholar working on Ecology, Evolution, Behavior and Systematics, Genetics and Insect Science. According to data from OpenAlex, John R. Grehan has authored 64 papers receiving a total of 460 indexed citations (citations by other indexed papers that have themselves been cited), including 38 papers in Ecology, Evolution, Behavior and Systematics, 37 papers in Genetics and 16 papers in Insect Science. Recurrent topics in John R. Grehan’s work include Lepidoptera: Biology and Taxonomy (34 papers), Plant and animal studies (23 papers) and Species Distribution and Climate Change (13 papers). John R. Grehan is often cited by papers focused on Lepidoptera: Biology and Taxonomy (34 papers), Plant and animal studies (23 papers) and Species Distribution and Climate Change (13 papers). John R. Grehan collaborates with scholars based in United States, New Zealand and Czechia. John R. Grehan's co-authors include Jeffrey H. Schwartz, Bruce L. Parker, Michael Heads, C. A. Stace, John E. Rawlins, Shelby J. Fleischer, Paul E. Blom, Jennifer A. White, Chris Harding and John D. Davis and has published in prestigious journals such as Biological reviews/Biological reviews of the Cambridge Philosophical Society, Forest Ecology and Management and Journal of Biogeography.

In The Last Decade

Co-authorship network of co-authors of John R. Grehan

This figure shows the co-authorship network connecting the top 25 collaborators of John R. Grehan. A scholar is included among the top collaborators of John R. Grehan based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with John R. Grehan. John R. Grehan is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

John R. Grehan

56 papers receiving 393 citations

Fields of papers citing papers by John R. Grehan

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by John R. Grehan. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by John R. Grehan. The network helps show where John R. Grehan may publish in the future.

Countries citing papers authored by John R. Grehan

Since Specialization

Citations

This map shows the geographic impact of John R. Grehan's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by John R. Grehan with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites John R. Grehan more than expected).

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar’s output or impact.

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